Match each MPLS VPN technology to its description.
Drag a concept onto its matching description — or click a concept then click the description.
Uses BGP to distribute VPN routes between PE routers
Emulates Layer 2 services like Ethernet or ATM over MPLS
Multipoint Layer 2 VPN that simulates an Ethernet LAN
Point-to-point Layer 2 VPN providing pseudowire connectivity
Multicast VPN that supports IP multicast over MPLS
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
MPLS Layer 3 VPN: Uses BGP to distribute customer routes between PE routers
MPLS provides multiple VPN services: Layer 3 VPNs use BGP for route exchange, Layer 2 VPNs emulate L2 circuits, TE controls traffic paths, and Inter-AS extends connectivity across providers. Common confusions involve swapping the L2 and L3 definitions.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
MPLS Layer 3 VPN: Uses BGP to distribute customer routes between PE routers
Why this is correct
MPLS Layer 3 VPN relies on BGP to exchange customer prefixes between Provider Edge routers.
MPLS Layer 2 VPN: Provides transparent transport of Layer 2 frames
Why this is correct
MPLS Layer 2 VPN emulates an L2 circuit over the MPLS backbone.
MPLS Traffic Engineering: Allows explicit path control for traffic flows
Why this is correct
MPLS TE enables constraint-based routing to optimize network utilization.
MPLS VPN Inter-AS: Connects VPNs across different service provider domains
Why this is correct
Inter-AS VPNs extend VPN connectivity between autonomous systems.
MPLS Layer 3 VPN: Provides transparent transport of Layer 2 frames
Why it's wrong here
Incorrect — L2 transport is a feature of MPLS Layer 2 VPN, not Layer 3 VPN.
MPLS Layer 2 VPN: Uses BGP to distribute customer routes between PE routers
Why it's wrong here
Incorrect — BGP route distribution is characteristic of MPLS Layer 3 VPN.
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